What do dna, proteins, and fats have in common? what do dna, proteins, and fats have in common? they are polar. they contain phosphorus. they contain carbonyl groups. they contain nitrogen. they are polymers?

They all contain carbonyl groups. DNA has carbonyl groups in it's nucleotide ring structures. Every amino acid in a protein has a carbonyl group in its backbone structure. Fats too have carbonyl groups in their structures attached to hydrocarbon chains